Jin buys boxes of crackers that each has the same cost c. He represents the cost of 5 boxes of cheese crackers, 4 boxes of poppy seed crackers, and 3 boxes of plain crackers using the expression 5 c plus 4 c plus 3 c. What equivalent expression can represent the cost?

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

answer:   y=2x-3

step-by-step explanation:

ask the math teacher she or he would know lol.

step-by-step explanation: